1989-1993 Cummins Performance Tips

Posted by Diesel Conversion on Jan 30th 2024

1989-1993 Cummins Performance Tips

Follow these links to good articles or you tube videos on fuel pin adjustments/replacements, smoke screw adjustments etc.



Bosch VE Injector Pump Governor Spring Swap

by Diesel Conversion Specialists

The 1989-1993 Cummins Bosch VE injector pump starts to drop off fuel as early as 2300 rpm and will pretty much stop at 2500 rpm- that's way too low for you guys with F-550's with 4.88 gears, and not exactly ideal for 3.73's either. 

 A good remedy for this issue is to swap out the fuel pin and governor springs with a kit like the one sold by BD Diesel.

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